We have just recieved a 89 Fleetwood 36 foot rv with ford parts. We can crank the rv with as low as 4 tries to as much as 20. It will only run for a second or two and then shut off. We replaced the one pump on the side but dont know if there are 2 fuel pumps or if it could be another issue. We fulltime so we really need to get this thing working so we can move it out of my fathers in law yard. All the batteries have been replaced so if anyone may know if there is another pump we need to change or if it might be another issue please let me know. All of my 4 kids really wanna get moving just as much as we do and since we upgraded from a 30 foot travel trailor to an rv we are quiet new to this.lol